/*
 * Copyright (c) 2010, Mariano Alvira <mar@devl.org> and other contributors
 * to the MC1322x project (http://mc1322x.devl.org)
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * This file is part of libmc1322x: see http://mc1322x.devl.org
 * for details. 
 *
 *
 */

/* control reset and VREF2 lines */

#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <getopt.h>
#include <ftdi.h>

#define DEBUG 0

#define low(x)  (1 << x)
#define high(x) (1 << (x + 8))

#define REDBEE_ECONOTAG_RESET    high(2)
#define REDBEE_ECONOTAG_VREF2L   high(7)
#define REDBEE_ECONOTAG_VREF2H   high(6) 
#define REDBEE_ECONOTAG_INTERFACE INTERFACE_A

#define REDBEE_USB_RESET    high(2)
#define REDBEE_USB_VREF2L   low(5)
#define REDBEE_USB_VREF2H   low(6)
#define REDBEE_USB_INTERFACE INTERFACE_B

#define FLEXIBITY_USB_RESET    high(2)
#define FLEXIBITY_USB_VREF2L   high(7)
#define FLEXIBITY_USB_VREF2H   high(6)
#define FLEXIBITY_USB_INTERFACE INTERFACE_A

#define BOARD REDBEE_USB

#define STR(x)         #x
#define STR2(x)        STR(x)
#define CAT(x,y)       x##y
#define CAT2(x, y, z)  x##y##z

#define dir(x)            ( CAT(x,_RESET) | CAT(x,_VREF2L) | CAT(x,_VREF2H))
#define interface(x)      ( CAT(x,_INTERFACE) )
#define reset_release(x)  ( CAT(x,_RESET)     )
#define reset_set(x)      ( 0 )
#define vref2_normal(x)   ( CAT(x,_VREF2H)    )
#define vref2_erase(x)    ( CAT(x,_VREF2L)    )

/* fgets input buffer length: for prompts and such */
#define BUF_LEN 32

struct layout {
	char *name;
	char *desc;
	enum ftdi_interface interface;
	uint16_t dir;
	uint16_t reset_release;
	uint16_t reset_set;
	uint16_t vref2_normal;
	uint16_t vref2_erase;
};

int print_and_prompt( struct ftdi_device_list *devlist );
int bb_mpsee(struct ftdi_context *ftdic, uint16_t dir, uint16_t val); 
void reset(struct ftdi_context *ftdic, const struct layout * l);
void erase(struct ftdi_context *ftdic, const struct layout * l);
void usage(void);

#define std_layout(x)                        \
	.interface = interface(x),           \
        .dir = dir(x),	                     \
	.reset_release = reset_release(x),   \
	.reset_set = reset_set(x),	     \
	.vref2_normal = vref2_normal(x),     \
	.vref2_erase = vref2_erase(x),     
	
static struct layout layouts[] =
{
	{ .name = "redbee-econotag",
	  .desc = "Redbee Econotag",
	  std_layout(REDBEE_ECONOTAG)
	},
	{ .name = "redbee-usb",
	  .desc = "Redbee USB stick",
	  std_layout(REDBEE_USB)
	},
	{ .name = "flexibity",
	  .desc = "Flexibity USB Interface",
	  std_layout(FLEXIBITY_USB)
	},
	{ .name = NULL, /* end of table */ },
};		

struct command {
	char *name;
	char *desc;
	void (*cmd)(struct ftdi_context *ftdic, const struct layout * l);
};
	
static const struct command commands[] =
{
	{
		.name = "reset",
		.desc = "Toggles reset pin",
		.cmd = reset,
	},
	{
		.name = "erase",
		.desc = "Sets VREF2 erase mode; toggles reset; waits 2 sec.; sets normal; toggles reset again",
		.cmd = erase,
	},
	{ .name = NULL, /* end of table */ },
}; 

struct layout * find_layout(char * str) 
{
	uint32_t i = 0;
	
	while(layouts[i].name != NULL) {
		if(strcmp(layouts[i].name, str) == 0) { return &layouts[i]; }
		i++;
	}

	return NULL;
}

static uint32_t vendid = 0x0403; uint32_t prodid = 0x6010;

int main(int argc, char **argv) 
{
	struct ftdi_context ftdic;
	struct ftdi_device_list *devlist;
	int dev_index = -1; int num_devs;
	char layout_str[BUF_LEN];
	struct layout layout;
	struct layout *l = NULL;
	int i, ret;

	/* overrides for layout parameters */
	int interface      = -1;
	int dir            = -1;
	int reset_release  = -1;
	int reset_set      = -1;
	int vref2_normal   = -1;
	int vref2_erase    = -1;

	layout.name = NULL;

	while (1) {
		int c;
		int option_index = 0;
		static struct option long_options[] = {
			{"layout",        required_argument, 0, 'l'},
			{"index",         required_argument, 0, 'i'},
			{"vendor",        required_argument, 0, 'v'},
			{"product",       required_argument, 0, 'p'},
			{"dir",           required_argument, 0,  0 },
			{"reset_release", required_argument, 0,  0 },
			{"reset_set",     required_argument, 0,  0 },
			{"vref2_normal",  required_argument, 0,  0 },
			{"vref2_erase",   required_argument, 0,  0 },
			{"interface",     required_argument, 0,  0 },
			{"help",          no_argument,       0, '?'},
			{0, 0, 0, 0}
		};
	
		c = getopt_long (argc, argv, "i:l:v:p:",
				 long_options, &option_index);
		if (c == -1)
			break;
		
		switch (c) {
			/* process long opts */
		case 0:
			if(strcmp(long_options[option_index].name, "interface") == 0) {
				sscanf(optarg, "%i", &interface);
			} 
			if(strcmp(long_options[option_index].name, "dir") == 0) {
				sscanf(optarg, "%i", &dir);
			} 
			if (strcmp(long_options[option_index].name, "reset_release") == 0) {
				sscanf(optarg, "%i", &reset_release);
			}
			if (strcmp(long_options[option_index].name, "reset_set") == 0) {
				sscanf(optarg, "%i", &reset_set);
			}
			if (strcmp(long_options[option_index].name, "vref2_normal") == 0) {
				sscanf(optarg, "%i", &vref2_normal);
			}
			if (strcmp(long_options[option_index].name, "vref2_erase") == 0) {
				sscanf(optarg, "%i", &vref2_erase);
			}
			break;
			
		case 'l':
			strncpy(layout_str, optarg, BUF_LEN);
			break;
		case 'i':
			dev_index = atoi(optarg);
			break;
		case 'v':
			sscanf(optarg, "%i", &vendid);
			break;
		case 'p':
			sscanf(optarg, "%i", &prodid);
			break;
		default:
			usage();
			break;
		}    
	}
	
	if( !(l = find_layout(layout_str)) &&
	    !((interface >= 0) &&
	      (dir >= 0) &&
	      (reset_release >= 0) &&
	      (reset_set >= 0) &&
	      (vref2_normal >= 0) &&
	      (vref2_erase >= 0))
		) {
		
		printf("*** You must specify a layout or a complete set of overrides\n");
		return EXIT_FAILURE;
	}
	
	if(l) {
		memcpy(&layout, l, sizeof(struct layout));
	} 

#define override(x) if(x > 0) { layout.x = x; }
	override(interface);
	override(dir);
	override(reset_release); override(reset_set);
	override(vref2_normal); override(vref2_erase);
	
	if ((num_devs = ftdi_usb_find_all(&ftdic, &devlist, vendid, prodid)) < 0)
	{
		fprintf(stderr, "ftdi_usb_find_all failed: %d (%s)\n", 
			num_devs, 
			ftdi_get_error_string(&ftdic));
		return EXIT_FAILURE;
	} 
	
	if (ftdi_init(&ftdic) < 0)
	{
		fprintf(stderr, "ftdi_init failed\n");
		return EXIT_FAILURE;
	}

	if (ftdi_set_interface(&ftdic, layout.interface) < 0) {
		fprintf(stderr, "couldn't set interface %d\n", layout.interface);
		return EXIT_FAILURE;
	}

	printf("Found %d devices with vendor id 0x%04x product id 0x%04x\n", 
	       num_devs, vendid, prodid);
	
	if(num_devs == 0) { return EXIT_SUCCESS; }

	if(num_devs == 1) { dev_index = 0; }
	while( (dev_index < 0) || (dev_index >= num_devs)){
		dev_index = print_and_prompt(devlist);
	}
	
	if(layout.name != NULL) {
		printf("Opening device %d interface %d using layout %s\n", 
		       dev_index, layout.interface, layout.name);
	} else {
		printf("Opening device %d interface %d without a layout.\n", 
		       dev_index, layout.interface);
	}

	if( (ret = ftdi_usb_open_desc_index(
		     &ftdic,
		     vendid,
		     prodid,
		     NULL,
		     NULL,
		     dev_index)) < 0) {
		fprintf(stderr, "couldn't open dev_index %d\n", dev_index);
		return EXIT_FAILURE;
	}

	
	for(i = 0; commands[i].name != NULL; i++) {	       
		if( (argv[optind] != NULL) &&
		    (strcmp(commands[i].name, argv[optind]) == 0)) { break; }
	}
	if(commands[i].name != NULL) {
		commands[i].cmd(&ftdic, &layout);
	} else {
		printf("invalid command\n");

		ftdi_list_free(&devlist);
		ftdi_deinit(&ftdic);

		return EXIT_FAILURE;
	}

	printf("done.\n");
	
	ftdi_list_free(&devlist);
	ftdi_deinit(&ftdic);
	
	return EXIT_SUCCESS;
}

void usage(void) 
{
	int i;
	printf(    "Usage: bbmc [options|overrides] -l|--layout layout command \n");
	printf(    "Commands:\n");
	for(i = 0; commands[i].name != NULL; i++) {
		printf(    "           %s: %s\n", commands[i].name, commands[i].desc);
	}
	printf("\n");
	printf(    "Required options:\n");
	printf(    "           -l|--layout\t specifiy which board layout to use\n");
	printf(    "                      \t layout is not necessary with a full\n");
	printf(    "                      \t set of overrides\n");
	printf(  "\nLayout overrides:\n");
	printf(    "           --interface\t\t FTDI interface to use\n");
	printf(    "           --dir\t\t direction (1 is output)\n");
	printf(    "           --reset_release\t reset release command\n");
	printf(    "           --reset_set\t\t reset set command\n");
	printf(    "           --vref2_normal\t vref2 normal\n");
	printf(    "           --vref2_erase\t vref2 erase\n");
	printf("\n");
	printf(    "Layouts:\n");
	for(i = 0; layouts[i].name != NULL; i++) {
		printf(    "\t%s: %s\n", layouts[i].name, layouts[i].desc);
		printf("\n");
		printf(    "\t\tinterface: \t0x%04x\n", layouts[i].interface);
		printf(    "\t\tdir: \t\t0x%04x\n", layouts[i].dir);
		printf(    "\t\treset release: \t0x%04x\n", layouts[i].reset_release);
		printf(    "\t\treset hold:    \t0x%04x\n", layouts[i].reset_set);
		printf(    "\t\tvref2 normal:  \t0x%04x\n", layouts[i].vref2_normal);
		printf(    "\t\tvref2 erase:   \t0x%04x\n", layouts[i].vref2_erase);
		printf("\n");
	}
	printf("\n");
	printf(    "Options:\n");
	printf(    "           -i|--index     specifiy which device to use (default 0)\n");
	printf(    "           -v|--vendor    set vendor id (default 0x0403)\n");
	printf(    "           -p|--product   set vendor id (default 0x6010)\n");
}

int print_and_prompt( struct ftdi_device_list *devlist ) 
{
	int i, ret;
	struct ftdi_context ftdic;
	struct ftdi_device_list *curdev;
	char manufacturer[128], description[128], serial[128];
	char input[BUF_LEN]; char *s;
	int sel = -1;

	printf("\n");

	i = 0;
	for (curdev = devlist; curdev != NULL; i++)
	{
		printf("  [%d]   ", i);
		if (0 > (ret = ftdi_usb_get_strings(&ftdic, 
						    curdev->dev, 
						    manufacturer, 128, 
						    description, 128, 
						    serial, 128)))
		{
			fprintf(stderr, "ftdi_usb_get_strings failed: %d (%s)\n", 
				ret, ftdi_get_error_string(&ftdic));
			return EXIT_FAILURE;
		}
		printf("Manufacturer: %s, Description: %s, Serial %s\n", 
		       manufacturer, description, serial);
		curdev = curdev->next;
	}

	printf("\nUse which device? ");

	s = fgets(input, BUF_LEN, stdin);
	if (s != NULL) {
		size_t last = strlen (input) - 1;		
		if (input[last] == '\n') input[last] = '\0';
	}

	sscanf(s, "%i",&sel);

	return sel;
}

void reset(struct ftdi_context *ftdic, const struct layout * l) 
{
	
        /* using MPSSE since it give access to high GPIO*/
	/* set as inputs for now */
	ftdi_set_bitmode(ftdic, 0 , BITMODE_MPSSE); 

	printf("toggle reset\n");

	bb_mpsee(ftdic, l->dir, (l->reset_release | l->vref2_normal));
	bb_mpsee(ftdic, l->dir, (l->reset_set     | l->vref2_normal));
	bb_mpsee(ftdic, l->dir, (l->reset_release | l->vref2_normal));

	return;

}


void erase(struct ftdi_context *ftdic, const struct layout * l) 
{
	printf("setting VREF2 erase\n");
	
        /* using MPSSE since it give access to high GPIO*/
	/* set as inputs for now */
	ftdi_set_bitmode(ftdic, 0 , BITMODE_MPSSE); 

	bb_mpsee(ftdic, l->dir, (l->reset_release | l->vref2_normal));
	bb_mpsee(ftdic, l->dir, (l->reset_release | l->vref2_erase));
	
	printf("toggle reset\n");
	
	bb_mpsee(ftdic, l->dir, (l->reset_set     | l->vref2_erase));
	bb_mpsee(ftdic, l->dir, (l->reset_release | l->vref2_erase));

	printf("waiting for erase\n");

	sleep(2);

	printf("setting VREF2 normal\n");
	
	bb_mpsee(ftdic, l->dir, (l->reset_release | l->vref2_normal));

	reset(ftdic, l);

	return;

}


int bb_mpsee(struct ftdi_context *ftdic, uint16_t dir, uint16_t val) 
{
	uint8_t buf[3];
	int ret;

	/* command "set data bits low byte" */
	buf[0] = 0x80;
	buf[1] = (val & 0xff);
	buf[2] = dir & 0xff;
#if DEBUG
	fprintf(stderr,"write %x %x %x\n",buf[0],buf[1],buf[2]);
#endif

	if ((ret = (ftdi_write_data(ftdic, buf, 3))) < 0)
	{
		perror("ft2232_write error");
		fprintf(stderr, "ft2232_write command %x\n", buf[0]);
		return EXIT_FAILURE;
	}


	/* command "set data bits high byte" */
	buf[0] = 0x82;         
	buf[1] = (val >> 8);
	buf[2] = dir >> 8;
#if DEBUG
	fprintf(stderr,"write %x %x %x\n",buf[0],buf[1],buf[2]);
#endif

	if ((ret = (ftdi_write_data(ftdic, buf, 3))) < 0)
	{
		perror("ft2232_write error");
		fprintf(stderr, "ft2232_write command %x\n", buf[0]);
		return EXIT_FAILURE;
	}

	return 0;

}
